Load type nickel base doped catalyst for biomass tar splitting and preparation method thereof

A nickel-based catalyst, tar cracking technology, applied in the direction of physical/chemical process catalysts, naphtha catalytic reforming, chemical instruments and methods, etc., can solve the problems of reduced activity of nickel-based catalysts, shortened catalyst life, reduced catalyst activity, etc. , to achieve low production cost, enhanced anti-carbon deposition and anti-high temperature sintering ability, and good catalytic effect

Inactive Publication Date: 2011-08-17
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ordinary commercial nickel-based catalysts not only have high production costs; but also are prone to carbon deposition and high-temperature sintering and rapidly deactivate in the high-temperature environment of biomass pyrolysis and gasification, which not only reduces the activity of the catalyst, but also seriously shortens the life of the catalyst.
Generally speaking, the deactivation of nickel-based catalysts is mainly caused by the following factors: first

Method used

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  • Load type nickel base doped catalyst for biomass tar splitting and preparation method thereof
  • Load type nickel base doped catalyst for biomass tar splitting and preparation method thereof
  • Load type nickel base doped catalyst for biomass tar splitting and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0027] Example 1

[0028] One of the preparations of supported doped nickel-based catalysts for biomass tar cracking. The preparation method consists of the following steps:

[0029] (1) Preparation of three metal salt solutions and uniform precipitant: the analytically pure 0.025molNi(NO 3 ) 2 ·6H 2 O, 0.01mol La(NO 3 ) 3 ·6H 2 O, 0.014mol Fe(NO 3 ) 3 ·9H 2 O and 0.20molCO(NH 2 ) 2 Dissolve in deionized water and stir it magnetically to make it evenly mixed to obtain a mixed solution of uniform concentration;

[0030] (2) Sedimentation: transfer the uniform mixed solution prepared in step (1) to a solution containing 8 grams of γ-Al 2 O 3 Carrier (spherical, particle size 2 ~ 4mm, purity> 99%) in a glass container, sealed, oil bath or electric heating to 115 ℃ and maintained for 2.5 hours, the precursor precipitate gradually deposited on the γ-Al 2 O 3 On the carrier, a tan sphere is obtained.

[0031] (3) Filtration and drying: The product of step (2) is suction filtered, washed with...

Example Embodiment

[0034] Example 2

[0035] The second preparation of a supported doped nickel-based catalyst for biomass tar cracking, the preparation method consists of the following steps:

[0036] (1) Preparation of three metal salt solutions and uniform precipitant: the analytically pure 0.035molNi(NO 3 ) 2 ·6H 2 O, 0.005mol La(NO 3 ) 3 ·6H 2 O, 0.015mol Fe(NO 3 ) 3 ·9H 2 O and 0.20molCO(NH 2 ) 2 Dissolve in deionized water and stir it magnetically to make it evenly mixed to obtain a mixed solution of uniform concentration;

[0037] (2) Sedimentation: transfer the uniform mixed solution prepared in step (1) to a solution containing 8 grams of γ-Al 2 O 3 Carrier (spherical, particle size 2 ~ 4mm, purity> 99%) in a glass container, sealed, oil bath or electric heating to 115 ℃ and maintained for 2.5 hours, the precursor precipitate gradually deposited on the γ-Al 2 O 3 On the carrier, a tan sphere is obtained.

[0038] (3) Filtration and drying: The product of step (2) is suction filtered, washed wit...

Example Embodiment

[0041] Example 3

[0042] The third preparation of a supported doped nickel-based catalyst for biomass tar cracking, the preparation method consists of the following steps:

[0043] (1) Preparation of three metal salt solutions and uniform precipitation agent: the analytically pure 0.03molNi(NO 3 ) 2 ·6H 2 O, 0.008mol La(NO 3 ) 3 ·6H 2 O, 0.016mol Fe(NO 3 ) 3 ·9H 2 O and 0.20molCO(NH 2 ) 2 Dissolve in deionized water and stir it magnetically to make it evenly mixed to obtain a mixed solution of uniform concentration;

[0044] (2) Sedimentation: transfer the uniform mixed solution prepared in step (1) to a solution containing 8 grams of γ-Al 2 O 3 Carrier (spherical, particle size 2 ~ 4mm, purity> 99%) in a glass container, sealed, oil bath or electric heating to 115 ℃ and maintained for 2.5 hours, the precursor precipitate gradually deposited on the γ-Al 2 O 3 On the carrier, a tan sphere is obtained.

[0045] (3) Filtration and drying: The product of step (2) is suction filtered, wash...

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Abstract

The invention discloses a load type nickel base doped catalyst for biomass tar splitting and a preparation method thereof. The catalyst takes a spherical gamma-Al2O3 carrier as an inner core and takes three metal dioxides NiO, Fe2O3 and La2O3 as active components loaded on the surface of the spherical gamma-Al2O3 carrier, wherein the percentages by weight of the components are as follows: 6.0-15.0wt% of NiO, 3.0-9.0wt% of Fe2O3, 2.0-8.0wt% of La2O3 and the balance of gamma-Al2O3. The preparation method comprises the steps of: dissolving and evenly mixing nickel salt, ferric salt, lanthanum salt and urea; transferring the mixture to a container in which the gamma-Al2O3 carrier is loaded and the sealing the mixture; and carrying out heating, sedimentation, filtration, washing, drying and calcination on the mixture to obtain the catalyst product. The catalyst is high in activity, low in production cost and long in service life and has the effect of effectively preventing the carbon deposition and the high-temperature sintering in the using process.

Description

Technical field [0001] The invention belongs to the field of energy and chemical industry, and specifically relates to a catalyst for the catalytic cracking and reforming process of biomass tar and its preparation technology. Background technique [0002] The dual pressure of energy crisis and environmental pollution has forced people to find clean renewable energy. Biomass energy is a renewable energy that can be stored and transported, and its efficient conversion and clean utilization have attracted widespread attention. Biomass thermal conversion and utilization technology is considered to be the most effective way to achieve biomass energy conversion, especially converting it into gas fuel or gasification for power generation, which has the advantages of convenient transmission and use, and high energy efficiency. However, in the process of biomass thermal conversion into gas fuel or gasification power generation, the presence of tar in the product gas has not been effective...

Claims

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Application Information

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IPC IPC(8): B01J23/83C10G11/04C10G35/06
Inventor 李建芬陈龙别妙廖世炎周晓荣刘建军晏蓉
Owner WUHAN POLYTECHNIC UNIVERSITY
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